openSUSE Leap 15 is based on SUSE Linux Enterprise (SLE).
The name “Leap 15” is meant to match the SUSE Linux Enterprise Version it is based off of.
(SUSE Linux Enterprise 15) Leap 15 uses Linux Kernel 4.12 LTS.
This guide was written during a upgrade from 42.3 to 15.0 and worked like a charm.